<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body bgcolor="yellow">
		<div align="center">
		<form action="cal" method="post">
		<h1>简易计算器的制作</h1><hr>
		第一个数:<input type="text" name="num1"><br>
		第二个数:<input type="text" name="num2"><br>
		&nbsp;&nbsp;操作类型:<select name="type">
							<option value="+">+</option>
							<option value="-">-</option>
							<option value="*">*</option>
							<option value="/">/</option>
						  </select>&nbsp;&nbsp;
		<input type="submit" value="计算"><br>
		</form>
		</div>
</body>
</html>